Descriptions of Four New Species of the Hoplosaenidea takizawai Group from the Greater Sunda Islands Area (Coleoptera: Chrysomelidae: Galerucinae)

Four new species of the Hoplosaenidea takizawai-group are described from the Greater Sunda Islands area: Hoplosaenidea javanica n. sp. from E. Java, H. jalur, H. duawarna, and H. sabahensis n. spp. from Sabah, Borneo. This group is characterized by male secondary sexual characters: fronto-clypeus widely excavated and furnished with small projections, and first antennal segment large, strongly expanded with a large triangular tooth. A key is provided to the seven known species from the group.